Squat with dumbbell exercise for leg muscles

Cataract

This animation depicts how a cataract is seen in the eye.

• Vision

Epinephrine and exercise

This animation shows the release of epinephrine and its effect of the heart.

• Exercise & Fitness

Need to relax? Take a break for meditation

Spend a few minutes on stress reduction with this guided meditation video.

Reverse crunch with fitness ball

You can do many core exercises with a fitness ball. See the reverse crunch.

Concussion

This animation shows the head receiving two impacts. One on the front, and one on the side from a boxing glove.

• Headache
• Pain